[hpsdr] atlas board

[Christopher T. Day]

Tom,

 

All ATX supplies are required to need the on/off, aka POWER_ON#, line
brought low to turn on the supply. That is what the power switch on your
PC does. The picoPSU60 is no different in this respect.

 

The picoPSU supplies do not provide -5V, so that LED won't light with
that supply. This is an optional supply voltage in the ATX spec. Other
ATX supplies may provide -5V, which will light that LED. The optional
nature of the -5V was only noticed after Atlas was designed. So far, no
plug-in cards for Atlas have needed -5V; Janus does use the -12V rail
which is required for all ATX supplies.

 

So far, everything you describe seems ok.

 

 

            Chris - AE6VK

 

 

  _____  

From: tom [mailto:w0kgw at citlink.net] 
Sent: Tuesday, July 25, 2006 9:39 AM
To: hpsdr at hpsdr.org
Subject: [hpsdr] atlas board

 

completed the install and had two problems with testing.  using the
picoPSU- 60-WI power supply i had to connect the on/off switch in order
to get it started. next the -5volt led didnot light. couldnot find any
reason so used a second powersupply to provide the -5 connected at the
test strip. now light lights.  the picture shows the first 5 led's lite
with the same power supply so checking there is no -5 on that power
supply. then looked for a schematic on the atlas board and have not had
luck.  think everything is ok but would like to make sure.

   any link to the schematic ??

tom

w0kgw at citlink.net

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20060725/c647e321/attachment-0004.htm>